/*****************************************************************************
* | File      	:   EPD_2IN66B.c
* | Author      :   Waveshare team
* | Function    :   2.66inch b e-paper
* | Info        :
*----------------
* |	This version:   V1.0
* | Date        :   2020-12-02
* | Info        :
* -----------------------------------------------------------------------------
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to  whom the Software is
# furished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
******************************************************************************/
#include "EPD_2in66b.h"
#include "Debug.h"
#include "GUI_Paint.h"

/******************************************************************************
function :	Software reset
parameter:
******************************************************************************/
static void EPD_2IN66B_Reset(void)
{
    DEV_Digital_Write(epd_rst, 1);
    DEV_Delay_ms(200);
    DEV_Digital_Write(epd_rst, 0);
    DEV_Delay_ms(3);
    DEV_Digital_Write(epd_rst, 1);
    DEV_Delay_ms(200);
}

/******************************************************************************
function :	send command
parameter:
     Reg : Command register
******************************************************************************/
static void EPD_2IN66B_SendCommand(UBYTE Reg) {
    DEV_Digital_Write(epd_dc, 0);
    DEV_Digital_Write(epd_cs, 0);
    DEV_SPI_WriteByte(Reg);
    DEV_Digital_Write(epd_cs, 1);
}

/******************************************************************************
function :	send data
parameter:
    Data : Write data
******************************************************************************/
static void EPD_2IN66B_SendData(UBYTE Data) {
    DEV_Digital_Write(epd_dc, 1);
    DEV_Digital_Write(epd_cs, 0);
    DEV_SPI_WriteByte(Data);
    DEV_Digital_Write(epd_cs, 1);
}

static void EPD_2IN66B_ReadBusy_HIGH(void)
{
    DEBUG("e-Paper busy\r\n");
    UBYTE busy;
    do {
        DEV_Delay_ms(20);
        busy = DEV_Digital_Read(epd_busy);
    } while(busy);
    DEV_Delay_ms(20);
    DEBUG("e-Paper busy release\r\n");
}


/******************************************************************************
function :	Setting the display window
parameter:
******************************************************************************/
static void EPD_2IN66B_SetWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
{
    EPD_2IN66B_SendCommand(0x44); // SET_RAM_X_ADDRESS_START_END_POSITION
    EPD_2IN66B_SendData((Xstart>>3) & 0x1F);
    EPD_2IN66B_SendData((Xend>>3) & 0x1F);
	
    EPD_2IN66B_SendCommand(0x45); // SET_RAM_Y_ADDRESS_START_END_POSITION
    EPD_2IN66B_SendData(Ystart & 0xFF);
    EPD_2IN66B_SendData((Ystart >> 8) & 0x01);
    EPD_2IN66B_SendData(Yend & 0xFF);
    EPD_2IN66B_SendData((Yend >> 8) & 0x01);
}

/******************************************************************************
function :	Set Cursor
parameter:
******************************************************************************/
static void EPD_2IN66B_SetCursor(UWORD Xstart, UWORD Ystart)
{
    EPD_2IN66B_SendCommand(0x4E); // SET_RAM_X_ADDRESS_COUNTER
    EPD_2IN66B_SendData(Xstart & 0x1F);

    EPD_2IN66B_SendCommand(0x4F); // SET_RAM_Y_ADDRESS_COUNTER
    EPD_2IN66B_SendData(Ystart & 0xFF);
    EPD_2IN66B_SendData((Ystart >> 8) & 0x01);
}

/******************************************************************************
function :	Initialize the e-Paper register
parameter:
******************************************************************************/
void EPD_2IN66B_Init(void)
{
    EPD_2IN66B_Reset();
    EPD_2IN66B_ReadBusy_HIGH();
    EPD_2IN66B_SendCommand(0x12);//soft  reset
    EPD_2IN66B_ReadBusy_HIGH();

	EPD_2IN66B_SendCommand(0x11); //data entry mode       
	EPD_2IN66B_SendData(0x03);

	EPD_2IN66B_SetWindows(0, 0, EPD_2IN66B_WIDTH-1, EPD_2IN66B_HEIGHT-1);
	
	EPD_2IN66B_SendCommand(0x21); //  Display update control
	EPD_2IN66B_SendData(0x00);
	EPD_2IN66B_SendData(0x80);	

	EPD_2IN66B_SetCursor(0, 0);
	EPD_2IN66B_ReadBusy_HIGH();
}

/******************************************************************************
function :	Turn On Display
parameter:
******************************************************************************/
static void TurnOnDisplay(void)
{
    EPD_2IN66B_SendCommand(0x20);
    EPD_2IN66B_ReadBusy_HIGH();
}

/******************************************************************************
function :  Clear screen
parameter:
******************************************************************************/
void EPD_2IN66B_Clear(void)
{
	UWORD i;
	UWORD IMAGE_COUNTER = (EPD_2IN66B_WIDTH / 8) * EPD_2IN66B_HEIGHT;

	EPD_2IN66B_SendCommand(0x24);
	for (i = 0; i < IMAGE_COUNTER; i++) {
		EPD_2IN66B_SendData(0xff);
	}

	EPD_2IN66B_SendCommand(0x26);
	for (i = 0; i < IMAGE_COUNTER; i++) {
		EPD_2IN66B_SendData(0x00);
	}
	
	TurnOnDisplay(); 
}

/******************************************************************************
function :  Sends the image buffer in RAM to e-Paper and displays
parameter:
******************************************************************************/
void EPD_2IN66B_Display(void)
{
  UWORD i;
  UWORD IMAGE_COUNTER = (EPD_2IN66B_WIDTH / 8) * EPD_2IN66B_HEIGHT;
  
	EPD_2IN66B_SendCommand(0x24);
	for (i = 0; i < IMAGE_COUNTER; i++) {
		EPD_2IN66B_SendData(SPIRAM_RD_Byte(i));
	}
	EPD_2IN66B_SendCommand(0x26);
	for (i = 0; i < IMAGE_COUNTER; i++) {
		EPD_2IN66B_SendData(~SPIRAM_RD_Byte(i + Paint_Image.Image_Offset));
	}
	TurnOnDisplay();
}

/******************************************************************************
function :	Enter sleep mode
parameter:
******************************************************************************/
void EPD_2IN66B_Sleep(void)
{
    EPD_2IN66B_SendCommand(0X10);
    EPD_2IN66B_SendData(0x01);
}
